Description of the Business and Segment Information - Equity in Income of Investees by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	$ 926	$ 814	$ 854
Vice Media
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	332	0	0
Media Networks | Cable
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	783	896	895
Media Networks | Broadcasting
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	(186)	(82)	(39)
Parks and Resorts
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	(3)	0	(2)
Total Segments
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	$ 594	$ 814	$ 854